Science IBPS,SBI,SSC,UPSC,Railways,IAS Prelims,KPSC,NCERT,CBSE

Frequency distribution of wind speeds in percentage terms in the form of a n chart.

Frequency distribution of wind speed associated with a cyclone.

Frequency distribution of wind speed and direction in polar coordination

Assertion (A): Sustainable production of hay or green fodder is essential or uninterrupted supply of animal products. Reason (R): Environmental concerns are detrimental for sustainable production of hay or green fodder.

Both ( A ) and (R) are true but (R) is not the correct explanation ( A ).

Both (A) and (R) are true and (R) is the correct explanation of (A)

(A) is true and (R) is false

(A) is false and (R) is true

For a clear sunny day with sun higher than 600 above horizon and wind speed greater than 6m/sec, the atmosphere is:

Stable

Slightly unstable

Moderately unstable

Very unstable

The time scale of meso- scale meteorological phenomenon is:

Hourse to a day

3-4 days

Few weeks

Few weeks to several months

How CO emitted by automobiles prevents transfer of O2 in the body tissue?

By changing O, into CO

By destroying the hemoglobin

By forming stable compound with hemoglobin

By obstruction the reaction of O2 with hemoglobin

In qualitative analysis the sulphides of Group II are precipitated in presence of dilute HCI, while of Group – IV are precipitated only in the presence of NH4 OH. It is because:

Solubility product of sulphides of Group II is greater than that of Group IV

Solubility product of sulphides of Group II is less than that of Group IV

Sulphides of Group II are insoluble in acids.

Sulphides of Group IV are insoluble in alkalies.

Arrange the following atmospheric gases in the decreasing order of their abundance: I. Oxygen

II. Carbon dioxideIII. ArgonIV. Methane

Code:

I > III > II > IV

II > I > III > IV

I > III > II > IV

III > I > IV > II

Which of the following is equivalent to the number of substrate molecules converted to product in a given unit of time by a single enzyme molecule when the enzyme is saturated with substrate?

Specific constant

Michaelis constant

Dissociation constant

Turn-over number

DOT is harmful from the ecological point of view mainly because it undergoes:

Biotransformation

Bioaccumulation

Biomagnifications

Biodegradation

Which of the following radiations continuously act on 14N to produce I4C isotope in the atmosphere?

X-rays

y-rays

UV-rays

Cosmic rays

The proteins in the cell walls of microorganisms have an overall net negative charge at pH of most soil environments, because:

the pH of the environment is greater than the pi

the pH of the environment is less than the pi

the pH of the environment is the same as pi

none of the above

Oxidoreductases:

oxidize a substrate by removing a pair of electrons and the accompanying hydrogen atoms.

Both ( A ) and (R) are true and (R) is the correct explanation of ( A ).

Both (A) and (R) are true but (R) is not the correct explanation of (A)

(A) is true but (R) is false

(A) is false but (R) is true.

In deep oceans, the phenomenon of inverted biomass pyramid occurs mainly due to:

I. Fast growth rate and high nutrient requirement of produces. II. Rapid turnover rate and short life span of producers. III. Slow growth rate and high nutrient requirement of herbivores. IV. Slow turnover and long the life span of herbivores

Which of the following combination is correct?

I and III

I and IV

II and HI

II and IV

Alpha diversity represents:

Species richness

Species evenness

Species richness and evenness

Species richness and dominance

Population of two species may interact in several ways. One of these called protoco-operation occurs when:

One population inhibits the other

Interaction is favorable to both but not obligatory

Interaction is favorable to both but obligatory

Neither population affects the other

The term benthos refers to communities which grow:

Attached on the bark of trees

Attached on ”submerged plants

Attached at the bottom of at water body

Attached on submerged woody roots

Pelagic sediments are found in the:

Continental shelf

continental slope

mid-oceanic ridges

deep oceanic plains

Pleistocene period began

5.0 million years ago

1 .7 million years ago

1 0 million years ago

28 million years ago

Sodium and Potassium in rock and soil materials are generally estimated by

UV – Visible spectrophotometer

Flame photometry

HPLC

Colorimetric

Match List I and List II in respect of the geochemical affinity of the elements: